Update rel_body.md

Author: sr55

.github/workflows/rel_body.md

@@ -1,6 +1,18 @@
-### Documentation
+## Documentation
 
-The HandBrake Documentation should be viewed at: https://handbrake.fr/docs/
+The HandBrake Documentation can be viewed at: https://handbrake.fr/docs/
+
+In addition, the below .zip and .tar.gz downloads provide copies of our documentation in HTML format.  
+
+## Usage Instructions: 
+
+### Local Viewing:
+You can view the documentation offline by opening “docs/index.html” in any browser. 
+
+### Web Viewing:
+This documentation is viewable at:  https://handbrake.fr/docs/
+
+If you wish to run your own copy of the documentation, it can be served by any web-server (Nginx, Apache, Lighttpd,  IIS etc). Since the provided documentation is HTML, JS, and CSS, there is no need for any special plugins.
 
 
 ### File Information